3 years ago

The length of an arc of a circle is equal to 1/5 of

2 answers:

7 0

2π = <span>2π * r / 5 => 1 = r / 5 => r = 5.</span>

7 0

Length of arc = 2π
circumference of circle = 5 . 2π = 10π since the arc is 1/5 of the circumference
C =2πr
r = C/2π = 10π/2π = 5

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